US7885716B2 - Audio/visual data communication system, audio/visual data transmitting device, and audio/visual data reproducing device - Google Patents

Audio/visual data communication system, audio/visual data transmitting device, and audio/visual data reproducing device Download PDF

Info

Publication number
US7885716B2
US7885716B2 US11/574,549 US57454905A US7885716B2 US 7885716 B2 US7885716 B2 US 7885716B2 US 57454905 A US57454905 A US 57454905A US 7885716 B2 US7885716 B2 US 7885716B2
Authority
US
United States
Prior art keywords
data
audio
unit
visual data
message
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US11/574,549
Other versions
US20070293955A1 (en
Inventor
Nobuyuki Yamashita
Kazuyoshi Tari
Kenzo Nakamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Assigned to MITSUBISHI MATERIALS CORPORATION reassignment MITSUBISHI MATERIALS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TARI, KAZUYOSHI, YAMASHITA, NOBUYUKI, NAKAMURA, KENZO
Publication of US20070293955A1 publication Critical patent/US20070293955A1/en
Application granted granted Critical
Publication of US7885716B2 publication Critical patent/US7885716B2/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/545—Audio/video application, e.g. interphone

Definitions

  • the present invention relates to an audio/visual data communication system for performing data communication through a power line, to an audio/visual data transmitting device, and to an audio/visual data reproducing device.
  • Patent Document 1 a speaker system disclosed in Patent Document 1 as below has been known as a technique for outputting data from an audio data transmitting device to an audio data reproducing speaker and reproducing the data.
  • audio data is wirelessly transmitted from one audio data transmitting device to a plurality of audio data reproducing speakers. In this way, the speakers can reproduce different types of audio data.
  • the present invention has been made in view of the above-mentioned problems, and an object of the invention is to provide an audio/visual data communication system including an audio/visual data reproducing device capable of changing the type of data to be transmitted, and an audio/visual data transmitting device and an audio/visual data reproducing device forming the audio/visual data communication system.
  • an audio/visual data communication system includes: an audio/visual data transmitting device that transmits data through a power line; and an audio/visual data reproducing device that receives the data and reproduces the data.
  • the audio/visual data reproducing device includes: an instruction input unit that inputs an instruction to change the data received from the audio/visual data transmitting device; a message generating unit that generates a message for requesting to change the data transmitted from the audio/visual data transmitted device on the basis of the instruction input through the instruction input unit; and a message transmitting unit that transmits the message generated by the message generating unit to the audio/visual data transmitting device.
  • the audio/visual data transmitting device includes: a message receiving unit that receives the message transmitted from the message transmitting unit; a data setting unit that sets data to be transmitted to the audio/visual data reproducing device on the basis of the message received by the message receiving unit; a data generating unit that generates transmission data to be transmitted to the audio/visual data reproducing device on the basis of the data set by the data setting unit; and a data transmitting unit that transmits the transmission data generated by the data generating unit to the audio/visual data reproducing device.
  • the audio/visual data transmitting device further includes a first group ID storage unit that stores group IDs for identifying the same audio/visual data
  • the audio/visual data reproducing device further includes a second group ID storage unit that stores the group IDs.
  • the data generating unit generates the transmission data having the group ID stored in the first group ID storage unit
  • the audio/visual data reproducing device receives data when the group ID included in the transmission data transmitted from the data transmitting unit is identical with the group ID stored in the second group ID storage unit.
  • the audio/visual data reproducing devices are arranged in a plurality of rooms, and the group IDs stored in the second group ID storage unit are allocated to the rooms according to the purpose of usage of the rooms.
  • an audio/visual data transmitting device transmits data to an audio/visual data reproducing device through a power line.
  • the audio/visual data transmitting device includes: a data storage unit that stores unique IDs allocated to the audio/video reproducing devices, group IDs for identifying the same audio/visual data, and audio/visual data; a message receiving unit that receives a message for requesting to change data to be transmitted to the audio/visual data reproducing device; a data setting unit that sets the data to be transmitted to the audio/visual data reproducing device on the basis of the message received by the message receiving unit; a data generating unit that generates transmission data on the basis of the data stored in the data storage unit and the data set by the data setting unit; and a data transmitting unit that transmits the transmission data generated by the data generating unit to the audio/visual data reproducing device through the power line.
  • the data setting unit sets the volume of the audio/visual data, the type of the audio/visual data, or a change of the audio/visual data transmitting device, which is a source of the audio/visual data.
  • an audio/visual data reproducing device receives data from an audio/visual data transmitting device through a power line.
  • the audio/visual data reproducing device includes: a data storage unit that stores unique IDs allocated to the audio/visual data reproducing devices and group IDs for identifying the same audio/visual data; a data receiving unit that determines whether to receive data transmitted from the audio/visual data transmitting device through the power line on the basis of the data stored in the data storage unit; an audio/visual data reproducing unit that reproduces the data received by the data receiving unit; an instruction input unit that inputs an instruction to change data reproduced by the audio/visual data reproducing device; a message generating unit that generates a message for requesting to change data to be transmitted to the audio/visual data transmitting device on the basis of the instruction input through the instruction input unit; and a message transmitting unit that transmits the message generated by the message generating unit to the audio/visual data transmitting device through the power line.
  • a user inputs instructions through the instruction input unit of the audio/visual data reproducing device, and the data setting unit of the audio/visual data transmitting device sets data to be transmitted to the audio/visual data reproducing device on the basis of the instruction.
  • the audio/visual data transmitting device and the audio/visual data reproducing device are arranged in different rooms, it is possible for a user to change the volume using the audio/visual data reproducing device, without operating the audio/visual data transmitting device. Thus, it is possible to improve the convenience of the user.
  • group IDs are stored in both the first group ID storage unit of the audio/visual data transmitting device and the second group ID storage unit of the audio/visual data reproducing device. Therefore, when the group ID included in data transmitted from the audio/visual data transmitting device is identical with the group ID stored in the second group ID storage unit, the audio/visual data reproducing device receives data.
  • the group ID enables the audio/visual data reproducing device to reproduce audio/visual data having the same group ID.
  • the group IDs stored in the second group ID storage unit are allocated to rooms according to the purpose of usage of the rooms, it is possible to prevent audio/visual data from being transmitted (reproduced) to the rooms not related to broadcasting or the rooms that are not used in the hotel or school, and thus to improve the efficiency of reproduction.
  • a room to be used by a user is set according to the language of the user, which makes it possible to perform broadcasting in a language corresponding to the user in the case of emergency broadcasting, and thus to improve safety in using facilities.
  • FIG. 1 is a block diagram of illustrating an audio data reproducing speaker 3 according to a first embodiment of the invention.
  • FIG. 2 is a diagram illustrating an audio data communication system according to the first embodiment of the invention.
  • FIG. 3 is a block diagram illustrating an audio data transmitting device 2 according to the first embodiment.
  • FIG. 4 is a diagram illustrating an example of a packet 5 transmitted from the audio data transmitting device 2 .
  • FIG. 5 is a flow chart illustrating a volume changing process by the audio data reproducing device.
  • FIG. 6 is a diagram illustrating the audio data communication system according to the first embodiment of the invention.
  • FIG. 7 is a diagram illustrating an audio data communication system according to a second embodiment of the invention.
  • FIG. 2 is a diagram illustrating an audio data communication system according to the first embodiment of the invention.
  • the audio data communication system includes an audio data transmitting device 2 a and an audio data reproducing speakers 3 .
  • audio data reproducing speakers 3 a , 3 b , 3 c , and 3 d are arranged as the audio data reproducing speakers 3 .
  • a room r 1 having the audio data transmitting device 2 a and the audio data reproducing speakers 3 a and 3 b provided therein and a room r 2 having the audio data reproducing speakers 3 c and 3 d provided therein are partitioned by a wall w 1 .
  • a power line 1 used to supply power to, for example, electric home appliances is provided in the room r 1 and the room r 2 .
  • Outlets 4 a to 4 c for obtaining power from the power line 1 are provided in the room r 1 .
  • outlets 4 d and 4 c are provided in the room r 2 .
  • the audio data transmitting device 2 a is connected to the outlet 4 a .
  • the audio data reproducing speakers 3 a and 3 b are connected to the outlets 4 b and 4 c , respectively.
  • the audio data reproducing speakers 3 c and 3 d are connected to the outlets 4 d and 4 e , respectively. In this way, power is supplied from the power line 1 to the audio data transmitting device 2 a and the audio data reproducing speakers 3 a to 3 d to drive these apparatuses.
  • the power line 1 is used for data communication as well as the supply of power. Therefore, it is possible to perform power line communication between the audio data transmitting device 2 a and the audio data reproducing speakers 3 a to 3 d through the power line 1 .
  • different group IDs ‘ID 1 ’ and ‘ID 2 ’ are allocated to the audio data reproducing speakers 3 a and 3 b provided in the room r 1 and the audio data reproducing speakers 3 c and 3 d provided in the room r 2 .
  • Audio data corresponding to the group ID is transmitted from the audio data transmitting device 2 a , and different audio data are reproduced by the audio data reproducing speakers 3 a and 3 b and the audio data reproducing speakers 3 c and 3 d having different group IDs.
  • FIG. 3 is a block diagram illustrating the structure of the audio data transmitting device 2 according to the first embodiment of the invention.
  • the audio data transmitting device 2 includes a data storage unit 20 , a data generating unit 24 , a data transmitting unit 25 , a message receiving unit 26 , and a data setting unit 27 .
  • the message receiving unit 26 receives a message transmitted from the audio data reproducing speakers 3 through the power line 1 and outputs the received message to the data setting unit 27 .
  • the data setting unit 27 includes a volume setting unit 27 a , a data setting unit 27 b , and a destination setting unit 27 c .
  • the data setting unit 27 distributes the message to the volume setting unit 27 a , the data setting unit 27 b , and the destination setting unit 27 c on the basis of the content of the message.
  • the message received by the data setting unit 27 includes an instruction to turn up the volume
  • the message is distributed to the volume setting unit 27 a , and the volume is adjusted according to the instruction included in the message.
  • the message received by the data setting unit 27 includes an instruction to transmit predetermined audio data
  • the message is distributed to the data setting unit 27 b , and the type of data to be transmitted to the audio data reproducing speakers 3 is set according to the instruction included in the message.
  • This is effective in applying the audio data communication system according to this embodiment to a 5.1 channel Dolby surround system. That is, when a plurality of audio data reproducing speakers 3 a and 3 b ( FIG. 2 ) are provided with respect to one audio data transmitting device 2 a ( FIG. 2 ), this is effective in allocating a plurality of audio data to the plurality of audio data reproducing speakers 3 a and 3 b and reproducing the audio data.
  • the data storage unit 20 includes a group ID storage unit 21 , an ID storage unit 22 , and an audio data storage unit 23 .
  • Audio data to be transmitted from the audio data transmitting device 2 to the audio data reproducing speakers 3 is stored in the audio data storage unit 23 .
  • the audio data stored in the audio data storage unit 23 is, for example, classical music data.
  • the ID storage unit 22 stores unique ID of the audio data transmitting device 2 . Even when a plurality of audio data transmitting devices 2 are connected to the power line 1 , the unique IDs make it possible to identify the audio data transmitting devices.
  • Group IDs are stored in the group ID storage unit 21 .
  • the group ID is ID for identifying the audio data.
  • the group ID is shared between the audio data transmitting device and the audio data reproducing speakers of a 5.1 channel Dolby surround system.
  • the group ID is used to identify the Dolby surround system.
  • a group ID ‘ID 1 ’ is allocated to the audio data transmitting device 2 a and the audio data reproducing speakers 3 a and 3 b
  • a group ID ‘ID 2 ’ is allocated to the audio data transmitting device 2 a and the audio data reproducing speakers 3 c and 3 d.
  • the data generating unit 24 generates packets to be output from the audio data transmitting device 2 to the audio data reproducing speakers 3 , on the basis of data input from the group ID storage unit 21 , the ID storage unit 22 , the audio data storage unit 23 , and the data setting unit 27 .
  • FIG. 4 shows an example of the structure of a packet 5 generated by the data generating unit 24 .
  • the packet 5 includes a group ID 5 a , packet information 5 b , an ID number 5 c , and audio data 5 d.
  • the group ID 5 a is generated on the basis of data of ‘group ID’ input from the group ID storage unit 21 ( FIG. 3 ). Since the packet 5 includes data of ‘group ID’, the data of the packet 5 can be transmitted to only the audio data reproducing speakers of a specific Dolby surround system.
  • the packet information 5 b is data indicating which information is included in the packet 5 .
  • the packet information 5 b includes data indicating which of six audio data used for the Dolby surround system is included in the packet 5 .
  • the ID number 5 c is generated on the basis of data on ID input from the ID storage unit 22 ( FIG. 3 ). Since the packet 5 includes data on ID, it is possible to identify which audio data transmitting device the packet 5 is transmitted from even when a plurality of audio data transmitting devices 2 are connected to the power line 1 .
  • the packet 5 ( FIG. 4 ) generated by the data generating unit 24 is output to the data transmitting unit 25 . Then, the packet 5 is transmitted from the data transmitting unit 25 to the audio data reproducing speakers 3 through the power line 1 .
  • FIG. 1 is a block diagram illustrating the structure of the audio data reproducing speaker 3 according to this embodiment.
  • the audio data reproducing speaker 3 includes a message transmitting unit 31 , a message generating unit 32 , an instruction input unit 33 , a data storage unit 34 , a data receiving unit 35 , and an audio data reproducing unit 36 .
  • the data storage unit 34 includes a group ID storage unit 34 a and an ID storage unit 34 b.
  • the group ID storage unit 34 a stores group IDs. When a plurality of audio data transmitting devices 2 are connected to the power line 1 , the group ID is used to determine one of the audio data transmitting devices 2 that transmits the audio data to be reproduced by the audio data reproducing speaker 3 .
  • Unique IDs of the audio data reproducing speakers 3 are stored in the ID storage unit 34 b . Since group IDs are stored in the group ID storage unit 34 a , the audio data reproducing speaker 3 can determine which of the audio data transmitting devices transmits data of the packet 5 (see FIG. 4 ).
  • the audio data reproducing speaker 3 determines to receive which of six audio data output from the Dolby surround system, on the basis of only the group ID. Therefore, ID of the audio data reproducing speaker 3 is used to determine which audio data is allocated to the audio data reproducing speakers 3 having the same group ID.
  • the data receiving unit 35 is connected to the power line 1 , and receives the packet 5 (see FIG. 4 ) transmitted from a predetermined audio data transmitting device 2 .
  • the data receiving unit 35 determines whether to receive the packet 5 on the basis of ‘ID’ or ‘the group ID’ stored in the data storage unit 34 .
  • the data receiving unit 35 When receiving the packet 5 allocated to the audio data reproducing speaker 3 , the data receiving unit 35 outputs the packet 5 to the audio data reproducing unit 36 .
  • the output data reproducing unit 36 for example, classical music is output from the speaker.
  • the instruction input unit 33 receives instructions from a user of the audio data reproducing speaker 3 .
  • the instructions of a user may be input to the instruction input unit 33 through a remote controller, or the user may directly input instructions through buttons provided in the audio data reproducing speakers 3 .
  • the instructions of the user input through the instruction input unit 33 is output to the message generating unit 32 .
  • the message generating unit 32 generates a message requesting the change of data to be transmitted to the audio data transmitting device 2 , on the basis of the instructions of the user input through the instruction input unit 33 .
  • the message generated by the message generating unit 32 is output to the message transmitting unit 31 .
  • the message transmitting unit 31 transmits the message input from the message generating unit 32 to the audio data transmitting device 2 through the power line 1 .
  • the user When the user listens to music output from the audio data reproducing speaker 3 , the user inputs an instruction to turn up the volume to the instruction input unit 33 of the audio data reproducing speaker 3 by using, for example, a remote controller.
  • the instruction of the user to turn up the volume is input to the instruction input unit 33 through, for example, a remote controller (step S 01 ).
  • the message generating unit 32 generates a message including the instruction to turn up the volume on the basis of the instruction of the user input through the instruction input unit 33 (step S 02 ).
  • the message generated by the message generating unit 32 is input to the message transmitting unit 31 , and is then transmitted to the audio data transmitting device 2 through the power line 1 (step S 03 ).
  • Step S 04 Data of the message transmitted by the audio data reproducing speaker 3 is received by the message receiving unit 26 of the audio data transmitting device 2 (step S 04 ). Then, the data received by the message receiving unit 26 is output to the data setting unit 27 .
  • the data setting unit 27 turns up the volume of the audio data to be transmitted to the audio data reproducing speaker 3 , on the basis of the instruction to turn up the volume included in the received message (step S 05 ).
  • the data generating unit 24 combines the volume set by the volume setting unit 27 a with the data input from the audio data storage unit 23 to generate data of the packet 5 ( FIG. 4 ) to be transmitted to the audio data reproducing speaker 3 (step S 06 ).
  • the data transmitting unit 25 transmits the data of the packet 5 generated by the data generating unit 24 to the audio data reproducing speaker 3 through the power line 1 (step S 07 ).
  • the data receiving unit 35 of the audio data reproducing speaker 3 receives the data of the packet 5 transmitted from the audio data transmitting device 2 through the power line 1 (step S 08 ).
  • the audio data reproducing unit 36 reproduces the data of the packet 5 input from the data receiving unit 35 , so that the audio data whose volume is turned up is output from the speaker (step S 09 ).
  • an audio data transmitting device 2 b and audio data reproducing speakers 3 e and 3 f are additionally connected to the audio data communication system shown in FIG. 2 through the power line 1 , it is possible for users to listen to music in the rooms r 1 to r 3 by using the Dolby surround system.
  • the audio data reproducing speakers 3 a and 3 b have the group ID ‘ID 1 ’, and it is possible to reproduce music specified by the group ID ‘ID 1 ’ in the room r 1 by reproducing the audio data transmitted from the audio data transmitting device 2 a.
  • the audio data reproducing speakers 3 e and 3 f have a group ID ‘ID 3 ’, and it is possible to reproduce music specified by the group ID ‘ID 3 ’ in the room r 3 by reproducing the audio data transmitted from the audio data transmitting device 2 b.
  • the audio reproducing speakers 3 c and 3 d arranged in the room r 2 have the group ID ‘ID 2 ’. Since the audio data specified by the group ID ‘ID 2 ’ is stored in both the audio data transmitting devices 2 a and 2 b , the audio reproducing speakers 3 c and 3 d may receive audio data from one of the audio data transmitting devices 2 a and 2 b and reproduce the audio data.
  • the ID number 5 c of the audio data transmitting device included in the packet 5 determines which of the audio data of the audio data transmitting devices 2 a and 2 b the audio reproducing speakers 3 c and 3 d receive.
  • communication channels are divided for the audio data transmitting device 2 and the audio data reproducing speakers 3 , which makes it possible to improve the efficiency of communication.
  • the audio data reproducing speaker 3 preferably receives only the data transmitted from a specific audio data transmitting device 2 , which makes it possible to simplify the receiving function of the audio data reproducing speaker 3 .
  • the audio data transmitting device collectively controls the audio data reproducing speakers 3 having the same group ID, which makes it possible to reduce a communication load of the audio data transmitting device 2 .
  • the audio data is transmitted through the power line 1 , but the invention is not limited thereto.
  • visual data may be transmitted through the power line 1 .
  • group IDs of group ID storage units 34 a of the audio data reproducing speakers 3 are changed according to the purpose of usage of the rooms r 1 , r 2 , and r 3 .
  • the same information (broadcasting content) is notified to all the rooms. Therefore, users not related to the notified information also listen to the broadcasted information carefully, which causes the users to temporarily stop their work. In addition, the information is also notified to the rooms not related to the broadcasted information or the rooms that are not used, which is inefficient. Further, in the case of emergency, since one specific language is used for emergency broadcasting, foreigners using different languages may not understand the broadcasted information, which makes it difficult for the foreigners to rapidly deal with the emergency.
  • different group IDs are allocated to the audio data reproducing speakers 3 a to 3 f arranged in the rooms r 1 , r 2 , and r 3 according to the purpose of usage of the rooms r 1 , r 2 , and r 3 , and the audio data transmitting devices 2 a and 2 b transmits necessary information corresponding to the group IDs suitable for the purpose of usage.
  • the rooms r 1 , r 2 , and r 3 are rooms of a hotel
  • the rooms r 1 and r 2 are prepared for domestic guests
  • the room 3 is prepared for foreign guests
  • the group ID ‘ID 1 ’ is allocated to the audio data reproducing speakers 3 a to 3 d arranged in the rooms r 1 and r 2
  • the group ID ‘ID 2 ’ is allocated to the audio data reproducing speakers 3 e and 3 f arranged in the room r 3 .
  • Japanese emergency broadcasting information including the group ID ‘ID 1 ’ is transmitted from the audio data transmitting device 2 a to the rooms r 1 and r 2 for domestic guests (user) through the power line 1 , and the Japanese emergency broadcasting data is reproduced by only the audio data reproducing speakers 3 a to 3 d arranged in the rooms r 1 and r 2 to which the group ID ‘ID 1 ’ is allocated.
  • foreign language (for example, English) emergency broadcasting information (audio data), which includes the group ID ‘ID 2 ’, corresponding to the foreign guest (user) is transmitted from the audio data transmitting device 2 b to the room r 3 through the power line 1 , and the foreign language emergency broadcasting data is reproduced by only the audio data reproducing speakers 3 e and 3 f arranged in the room 3 to which the group ID ‘ID 2 ’ is allocated.
  • broadcasting data for the fourth to sixth grades, including the group ID ‘ID 1 ’
  • the audio data transmitting device 2 is transmitted from the rooms r 1 and r 2 , which are classrooms for the fourth to sixth grades, through the power line 1 , and the broadcasting data for the fourth to sixth grades is reproduced by only the audio data reproducing speakers 3 a to 3 d arranged in the rooms r 1 and r 2 to which the group ID ‘ID 1 ’ is allocated.
  • broadcasting data (audio data) for the first to third grades, including the group ID ‘ID 2 ’
  • the broadcasting data for the first to third grades is reproduced by only the audio data reproducing speakers 3 e and 3 f arranged in the room r 3 to which the group ID ‘ID 2 ’ is allocated.
  • a user or an administrator may arbitrarily change the group IDs of the group ID storage unit 34 a according to users for the rooms r 1 , r 2 , and r 3 .
  • control signals may be transmitted from the audio data transmitting devices 2 a and 2 b to the audio data reproducing speakers 3 a to 3 f through the power line 1 .
  • the group IDs ‘ID 1 ’ and ‘ID 2 ’ of the group ID storage unit 34 a of each of the audio data reproducing speakers 3 a to 3 f are allocated to the rooms r 1 , r 2 , and r 3 according to the purpose of usage of the rooms r 1 , r 2 , and r 3 . Therefore, it is possible to prevent audio data from being transmitted (reproduced) to rooms not related to broadcasting or rooms that are not used in the hotel or school, which makes it possible to effectively reproduce broadcasting data.
  • a room to be used by a user is set according to the language of the user, which makes it possible to perform broadcasting in a language corresponding to the user in the case of emergency broadcasting, and thus to improve safety in using facilities.
  • the audio data communication system using the power line according to the present invention can be applied to a 5.1 channel Dolby surround system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

The present invention provides an audio/visual data communication system including an audio/visual data reproducing device capable of changing the type of data to be transmitted. Further, the present invention provides an audio/visual data transmitting device and an audio/visual data reproducing device forming the audio/visual data communication system. An audio data reproducing speaker 3 includes an instruction input unit 33 that inputs an instruction to change data transmitted from an audio data transmitting device, a message generating unit 32 that generates a message for requesting to change data on the basis of the instruction, and a message transmitting unit 31 that transmits the message. The audio data transmitting device includes a message receiving unit that receives the message transmitted from the message transmitting unit 31, a data setting unit that sets data on the basis of the message, a data generating unit that generates transmission data on the basis of the data set by the data setting unit, and a data transmitting unit that transmits the transmission data.

Description

CROSS-REFERENCE TO PRIOR APPLICATION
This is a U.S. National Phase Application under 35 U.S.C. §371 of International Patent Application No. PCT/JP2005/016081 filed Sep. 2, 2005, and claims the benefit of Japanese Patent Application Nos. 2004-255416, filed Sep. 2, 2004 and 2004-245472, filed Aug. 26, 2005, both of which are incorporated by reference herein. The International Application was published in Japanese on Mar. 9, 2006 as WO 2006/025514 A1 under PCT Article 21(2).
TECHNICAL FIELD
The present invention relates to an audio/visual data communication system for performing data communication through a power line, to an audio/visual data transmitting device, and to an audio/visual data reproducing device.
BACKGROUND ART OF THE INVENTION
In general, a speaker system disclosed in Patent Document 1 as below has been known as a technique for outputting data from an audio data transmitting device to an audio data reproducing speaker and reproducing the data.
In the speaker system, audio data is wirelessly transmitted from one audio data transmitting device to a plurality of audio data reproducing speakers. In this way, the speakers can reproduce different types of audio data.
However, data is transmitted from the audio data transmitting device to the audio data reproducing speakers, but it is difficult to transmit data from the audio data reproducing speakers to the audio data transmitting device.
Therefore, when the audio data transmitting device and the audio data reproducing speakers are provided in different rooms, it is difficult for the audio data reproducing speaker to change the volume or audio data to be reproduced, which is inconvenient for use.
  • PATENT DOCUMENT 1: Japanese Unexamined Patent Application, First Publication No. 2001-275194
DETAILED DESCRIPTION OF THE INVENTION Problems to be Solved by the Invention
The present invention has been made in view of the above-mentioned problems, and an object of the invention is to provide an audio/visual data communication system including an audio/visual data reproducing device capable of changing the type of data to be transmitted, and an audio/visual data transmitting device and an audio/visual data reproducing device forming the audio/visual data communication system.
Means for Solving the Problem
According to the present invention of claim 1, an audio/visual data communication system includes: an audio/visual data transmitting device that transmits data through a power line; and an audio/visual data reproducing device that receives the data and reproduces the data. The audio/visual data reproducing device includes: an instruction input unit that inputs an instruction to change the data received from the audio/visual data transmitting device; a message generating unit that generates a message for requesting to change the data transmitted from the audio/visual data transmitted device on the basis of the instruction input through the instruction input unit; and a message transmitting unit that transmits the message generated by the message generating unit to the audio/visual data transmitting device. The audio/visual data transmitting device includes: a message receiving unit that receives the message transmitted from the message transmitting unit; a data setting unit that sets data to be transmitted to the audio/visual data reproducing device on the basis of the message received by the message receiving unit; a data generating unit that generates transmission data to be transmitted to the audio/visual data reproducing device on the basis of the data set by the data setting unit; and a data transmitting unit that transmits the transmission data generated by the data generating unit to the audio/visual data reproducing device.
According to the present invention of claim 2, in the audio/visual data communication system according to claim 1, preferably, the audio/visual data transmitting device further includes a first group ID storage unit that stores group IDs for identifying the same audio/visual data, and the audio/visual data reproducing device further includes a second group ID storage unit that stores the group IDs. Preferably, the data generating unit generates the transmission data having the group ID stored in the first group ID storage unit, and the audio/visual data reproducing device receives data when the group ID included in the transmission data transmitted from the data transmitting unit is identical with the group ID stored in the second group ID storage unit.
According to the present invention of claim 3, in the audio/visual data communication system according to claim 2, preferably, the audio/visual data reproducing devices are arranged in a plurality of rooms, and the group IDs stored in the second group ID storage unit are allocated to the rooms according to the purpose of usage of the rooms.
According to the present invention of claim 4, an audio/visual data transmitting device transmits data to an audio/visual data reproducing device through a power line. The audio/visual data transmitting device includes: a data storage unit that stores unique IDs allocated to the audio/video reproducing devices, group IDs for identifying the same audio/visual data, and audio/visual data; a message receiving unit that receives a message for requesting to change data to be transmitted to the audio/visual data reproducing device; a data setting unit that sets the data to be transmitted to the audio/visual data reproducing device on the basis of the message received by the message receiving unit; a data generating unit that generates transmission data on the basis of the data stored in the data storage unit and the data set by the data setting unit; and a data transmitting unit that transmits the transmission data generated by the data generating unit to the audio/visual data reproducing device through the power line.
According to the present invention of claim 5, in the audio/visual data transmitting device according to claim 4, preferably, the data setting unit sets the volume of the audio/visual data, the type of the audio/visual data, or a change of the audio/visual data transmitting device, which is a source of the audio/visual data.
According to the present invention of claim 6, an audio/visual data reproducing device receives data from an audio/visual data transmitting device through a power line. The audio/visual data reproducing device includes: a data storage unit that stores unique IDs allocated to the audio/visual data reproducing devices and group IDs for identifying the same audio/visual data; a data receiving unit that determines whether to receive data transmitted from the audio/visual data transmitting device through the power line on the basis of the data stored in the data storage unit; an audio/visual data reproducing unit that reproduces the data received by the data receiving unit; an instruction input unit that inputs an instruction to change data reproduced by the audio/visual data reproducing device; a message generating unit that generates a message for requesting to change data to be transmitted to the audio/visual data transmitting device on the basis of the instruction input through the instruction input unit; and a message transmitting unit that transmits the message generated by the message generating unit to the audio/visual data transmitting device through the power line.
ADVANTAGEOUS EFFECTS OF THE INVENTION
According to the invention, a user inputs instructions through the instruction input unit of the audio/visual data reproducing device, and the data setting unit of the audio/visual data transmitting device sets data to be transmitted to the audio/visual data reproducing device on the basis of the instruction.
Therefore, even when the audio/visual data transmitting device and the audio/visual data reproducing device are arranged in different rooms, it is possible for a user to change the volume using the audio/visual data reproducing device, without operating the audio/visual data transmitting device. Thus, it is possible to improve the convenience of the user.
Further, in the invention, group IDs are stored in both the first group ID storage unit of the audio/visual data transmitting device and the second group ID storage unit of the audio/visual data reproducing device. Therefore, when the group ID included in data transmitted from the audio/visual data transmitting device is identical with the group ID stored in the second group ID storage unit, the audio/visual data reproducing device receives data.
Therefore, even when a plurality of audio/visual data transmitting devices are connected to the power line, the group ID enables the audio/visual data reproducing device to reproduce audio/visual data having the same group ID.
Furthermore, in the invention, since the group IDs stored in the second group ID storage unit are allocated to rooms according to the purpose of usage of the rooms, it is possible to prevent audio/visual data from being transmitted (reproduced) to the rooms not related to broadcasting or the rooms that are not used in the hotel or school, and thus to improve the efficiency of reproduction. In particular, in the hotel, a room to be used by a user is set according to the language of the user, which makes it possible to perform broadcasting in a language corresponding to the user in the case of emergency broadcasting, and thus to improve safety in using facilities.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of illustrating an audio data reproducing speaker 3 according to a first embodiment of the invention.
FIG. 2 is a diagram illustrating an audio data communication system according to the first embodiment of the invention.
FIG. 3 is a block diagram illustrating an audio data transmitting device 2 according to the first embodiment.
FIG. 4 is a diagram illustrating an example of a packet 5 transmitted from the audio data transmitting device 2.
FIG. 5 is a flow chart illustrating a volume changing process by the audio data reproducing device.
FIG. 6 is a diagram illustrating the audio data communication system according to the first embodiment of the invention.
FIG. 7 is a diagram illustrating an audio data communication system according to a second embodiment of the invention.
 DESCRIPTION OF THE REFERENCE SYMBOLS
1 POWER LINE
2 (2 a, 2 b) AUDIO DATA TRANSMITTING DEVICE
20 DATA STORAGE UNIT
24 DATA GENERATING UNIT
25 DATA TRANSMITTING UNIT
26 MESSAGE RECEIVING UNIT
27 DATA SETTING UNIT
3 (3 a to 3 f) AUDIO DATA REPRODUCING SPEAKER
31 MESSAGE TRANSMITTING UNIT
32 MESSAGE GENERATING UNIT
33 INSTRUCTION INPUT UNIT
34 DATA STORAGE UNIT
35 DATA RECEIVING UNIT
36 AUDIO DATA REPRODUCING UNIT
4 (4 a, 4 b, 4 c, 4 d, 4 f, 4 g, 4 h)OUTLET
5 PACKET
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the invention will be described with reference to the accompanying drawings.
FIG. 2 is a diagram illustrating an audio data communication system according to the first embodiment of the invention.
The audio data communication system according to the first embodiment includes an audio data transmitting device 2 a and an audio data reproducing speakers 3. In this embodiment, audio data reproducing speakers 3 a, 3 b, 3 c, and 3 d are arranged as the audio data reproducing speakers 3.
A room r1 having the audio data transmitting device 2 a and the audio data reproducing speakers 3 a and 3 b provided therein and a room r2 having the audio data reproducing speakers 3 c and 3 d provided therein are partitioned by a wall w1.
A power line 1 used to supply power to, for example, electric home appliances is provided in the room r1 and the room r2. Outlets 4 a to 4 c for obtaining power from the power line 1 are provided in the room r1. Similarly, outlets 4 d and 4 c are provided in the room r2.
The audio data transmitting device 2 a is connected to the outlet 4 a. The audio data reproducing speakers 3 a and 3 b are connected to the outlets 4 b and 4 c, respectively.
The audio data reproducing speakers 3 c and 3 d are connected to the outlets 4 d and 4 e, respectively. In this way, power is supplied from the power line 1 to the audio data transmitting device 2 a and the audio data reproducing speakers 3 a to 3 d to drive these apparatuses.
In this embodiment, the power line 1 is used for data communication as well as the supply of power. Therefore, it is possible to perform power line communication between the audio data transmitting device 2 a and the audio data reproducing speakers 3 a to 3 d through the power line 1.
In the audio data communication system according to this embodiment, different group IDs ‘ID1’ and ‘ID2’ are allocated to the audio data reproducing speakers 3 a and 3 b provided in the room r1 and the audio data reproducing speakers 3 c and 3 d provided in the room r2.
Audio data corresponding to the group ID is transmitted from the audio data transmitting device 2 a, and different audio data are reproduced by the audio data reproducing speakers 3 a and 3 b and the audio data reproducing speakers 3 c and 3 d having different group IDs.
Next, the structure of the audio data transmitting device 2 will be described in detail below.
FIG. 3 is a block diagram illustrating the structure of the audio data transmitting device 2 according to the first embodiment of the invention.
The audio data transmitting device 2 according to this embodiment includes a data storage unit 20, a data generating unit 24, a data transmitting unit 25, a message receiving unit 26, and a data setting unit 27.
The message receiving unit 26 receives a message transmitted from the audio data reproducing speakers 3 through the power line 1 and outputs the received message to the data setting unit 27.
The data setting unit 27 includes a volume setting unit 27 a, a data setting unit 27 b, and a destination setting unit 27 c. When the message is input to the data setting unit 27 from the message receiving unit 26, the data setting unit 27 distributes the message to the volume setting unit 27 a, the data setting unit 27 b, and the destination setting unit 27 c on the basis of the content of the message.
For example, when the message received by the data setting unit 27 includes an instruction to turn up the volume, the message is distributed to the volume setting unit 27 a, and the volume is adjusted according to the instruction included in the message.
When the message received by the data setting unit 27 includes an instruction to transmit predetermined audio data, the message is distributed to the data setting unit 27 b, and the type of data to be transmitted to the audio data reproducing speakers 3 is set according to the instruction included in the message.
This is effective in applying the audio data communication system according to this embodiment to a 5.1 channel Dolby surround system. That is, when a plurality of audio data reproducing speakers 3 a and 3 b (FIG. 2) are provided with respect to one audio data transmitting device 2 a (FIG. 2), this is effective in allocating a plurality of audio data to the plurality of audio data reproducing speakers 3 a and 3 b and reproducing the audio data.
The data storage unit 20 includes a group ID storage unit 21, an ID storage unit 22, and an audio data storage unit 23.
Audio data to be transmitted from the audio data transmitting device 2 to the audio data reproducing speakers 3 is stored in the audio data storage unit 23. The audio data stored in the audio data storage unit 23 is, for example, classical music data.
The ID storage unit 22 stores unique ID of the audio data transmitting device 2. Even when a plurality of audio data transmitting devices 2 are connected to the power line 1, the unique IDs make it possible to identify the audio data transmitting devices.
Group IDs are stored in the group ID storage unit 21. The group ID is ID for identifying the audio data. For example, the group ID is shared between the audio data transmitting device and the audio data reproducing speakers of a 5.1 channel Dolby surround system. When an audio data communication system is connected to the power line 1 by using a plurality of Dolby surround systems, the group ID is used to identify the Dolby surround system.
For example, in FIG. 2, a group ID ‘ID1’ is allocated to the audio data transmitting device 2 a and the audio data reproducing speakers 3 a and 3 b, and a group ID ‘ID2’ is allocated to the audio data transmitting device 2 a and the audio data reproducing speakers 3 c and 3 d.
In FIG. 3, the data generating unit 24 generates packets to be output from the audio data transmitting device 2 to the audio data reproducing speakers 3, on the basis of data input from the group ID storage unit 21, the ID storage unit 22, the audio data storage unit 23, and the data setting unit 27.
FIG. 4 shows an example of the structure of a packet 5 generated by the data generating unit 24. The packet 5 includes a group ID 5 a, packet information 5 b, an ID number 5 c, and audio data 5 d.
The group ID 5 a is generated on the basis of data of ‘group ID’ input from the group ID storage unit 21 (FIG. 3). Since the packet 5 includes data of ‘group ID’, the data of the packet 5 can be transmitted to only the audio data reproducing speakers of a specific Dolby surround system.
The packet information 5 b is data indicating which information is included in the packet 5. For example, the packet information 5 b includes data indicating which of six audio data used for the Dolby surround system is included in the packet 5.
The ID number 5 c is generated on the basis of data on ID input from the ID storage unit 22 (FIG. 3). Since the packet 5 includes data on ID, it is possible to identify which audio data transmitting device the packet 5 is transmitted from even when a plurality of audio data transmitting devices 2 are connected to the power line 1.
The packet 5 (FIG. 4) generated by the data generating unit 24 is output to the data transmitting unit 25. Then, the packet 5 is transmitted from the data transmitting unit 25 to the audio data reproducing speakers 3 through the power line 1.
Next, the structure of the audio data reproducing speaker 3 (FIG. 2) will be described in detail below.
FIG. 1 is a block diagram illustrating the structure of the audio data reproducing speaker 3 according to this embodiment.
The audio data reproducing speaker 3 includes a message transmitting unit 31, a message generating unit 32, an instruction input unit 33, a data storage unit 34, a data receiving unit 35, and an audio data reproducing unit 36.
The data storage unit 34 includes a group ID storage unit 34 a and an ID storage unit 34 b.
The group ID storage unit 34 a stores group IDs. When a plurality of audio data transmitting devices 2 are connected to the power line 1, the group ID is used to determine one of the audio data transmitting devices 2 that transmits the audio data to be reproduced by the audio data reproducing speaker 3.
Unique IDs of the audio data reproducing speakers 3 are stored in the ID storage unit 34 b. Since group IDs are stored in the group ID storage unit 34 a, the audio data reproducing speaker 3 can determine which of the audio data transmitting devices transmits data of the packet 5 (see FIG. 4).
However, it is difficult for the audio data reproducing speaker 3 to determine to receive which of six audio data output from the Dolby surround system, on the basis of only the group ID. Therefore, ID of the audio data reproducing speaker 3 is used to determine which audio data is allocated to the audio data reproducing speakers 3 having the same group ID.
The data receiving unit 35 is connected to the power line 1, and receives the packet 5 (see FIG. 4) transmitted from a predetermined audio data transmitting device 2. The data receiving unit 35 determines whether to receive the packet 5 on the basis of ‘ID’ or ‘the group ID’ stored in the data storage unit 34.
When receiving the packet 5 allocated to the audio data reproducing speaker 3, the data receiving unit 35 outputs the packet 5 to the audio data reproducing unit 36. In the output data reproducing unit 36, for example, classical music is output from the speaker.
The instruction input unit 33 receives instructions from a user of the audio data reproducing speaker 3. For example, an instruction to adjust the volume of the speaker of the audio data reproducing unit 36, an instruction to change the genre of music reproduced by the audio data reproducing unit 36, or an instruction to change the audio data transmitting device 2, which is a source of data, is input to the instruction input unit 33.
The instructions of a user may be input to the instruction input unit 33 through a remote controller, or the user may directly input instructions through buttons provided in the audio data reproducing speakers 3.
The instructions of the user input through the instruction input unit 33 is output to the message generating unit 32. The message generating unit 32 generates a message requesting the change of data to be transmitted to the audio data transmitting device 2, on the basis of the instructions of the user input through the instruction input unit 33.
The message generated by the message generating unit 32 is output to the message transmitting unit 31. The message transmitting unit 31 transmits the message input from the message generating unit 32 to the audio data transmitting device 2 through the power line 1.
Next, a process of changing the volume of audio data output from the audio data reproducing speaker 3 by using the audio data communication system according to the first embodiment of the invention will be described with reference to the sequence shown in FIG. 5.
When the user listens to music output from the audio data reproducing speaker 3, the user inputs an instruction to turn up the volume to the instruction input unit 33 of the audio data reproducing speaker 3 by using, for example, a remote controller.
The instruction of the user to turn up the volume is input to the instruction input unit 33 through, for example, a remote controller (step S01).
Next, the message generating unit 32 generates a message including the instruction to turn up the volume on the basis of the instruction of the user input through the instruction input unit 33 (step S02).
Then, the message generated by the message generating unit 32 is input to the message transmitting unit 31, and is then transmitted to the audio data transmitting device 2 through the power line 1 (step S03).
Data of the message transmitted by the audio data reproducing speaker 3 is received by the message receiving unit 26 of the audio data transmitting device 2 (step S04). Then, the data received by the message receiving unit 26 is output to the data setting unit 27.
The data setting unit 27 turns up the volume of the audio data to be transmitted to the audio data reproducing speaker 3, on the basis of the instruction to turn up the volume included in the received message (step S05).
The data generating unit 24 combines the volume set by the volume setting unit 27 a with the data input from the audio data storage unit 23 to generate data of the packet 5 (FIG. 4) to be transmitted to the audio data reproducing speaker 3 (step S06).
The data transmitting unit 25 transmits the data of the packet 5 generated by the data generating unit 24 to the audio data reproducing speaker 3 through the power line 1 (step S07).
The data receiving unit 35 of the audio data reproducing speaker 3 receives the data of the packet 5 transmitted from the audio data transmitting device 2 through the power line 1 (step S08).
The audio data reproducing unit 36 reproduces the data of the packet 5 input from the data receiving unit 35, so that the audio data whose volume is turned up is output from the speaker (step S09).
According to this embodiment, even when an audio data transmitting device 2 b and audio data reproducing speakers 3 e and 3 f are additionally connected to the audio data communication system shown in FIG. 2 through the power line 1, it is possible for users to listen to music in the rooms r1 to r3 by using the Dolby surround system.
In FIG. 6, the audio data reproducing speakers 3 a and 3 b have the group ID ‘ID1’, and it is possible to reproduce music specified by the group ID ‘ID1’ in the room r1 by reproducing the audio data transmitted from the audio data transmitting device 2 a.
Further, the audio data reproducing speakers 3 e and 3 f have a group ID ‘ID3’, and it is possible to reproduce music specified by the group ID ‘ID3’ in the room r3 by reproducing the audio data transmitted from the audio data transmitting device 2 b.
The audio reproducing speakers 3 c and 3 d arranged in the room r2 have the group ID ‘ID2’. Since the audio data specified by the group ID ‘ID2’ is stored in both the audio data transmitting devices 2 a and 2 b, the audio reproducing speakers 3 c and 3 d may receive audio data from one of the audio data transmitting devices 2 a and 2 b and reproduce the audio data. The ID number 5 c of the audio data transmitting device included in the packet 5 determines which of the audio data of the audio data transmitting devices 2 a and 2 b the audio reproducing speakers 3 c and 3 d receive.
In FIG. 6, even when the audio data reproducing speaker 3 d is out of order and another audio data reproducing speaker is connected to the outlet 4 e, it is possible to reproduce music using the additional audio reproducing speaker by only resetting the group ID, without setting other conditions.
In this way, for example, when an instruction to turn up the volume is output from a certain audio data reproducing speaker 3, it is possible to control another audio data reproducing speaker 3 having the same group ID to turn up the volume by managing one audio data communication system for every group ID.
According to the audio data communication system in accordance with the first embodiment of the invention, communication channels are divided for the audio data transmitting device 2 and the audio data reproducing speakers 3, which makes it possible to improve the efficiency of communication.
Further, the audio data reproducing speaker 3 preferably receives only the data transmitted from a specific audio data transmitting device 2, which makes it possible to simplify the receiving function of the audio data reproducing speaker 3.
The audio data transmitting device collectively controls the audio data reproducing speakers 3 having the same group ID, which makes it possible to reduce a communication load of the audio data transmitting device 2.
In the above-described embodiment, the audio data is transmitted through the power line 1, but the invention is not limited thereto. For example, visual data may be transmitted through the power line 1.
Next, a second embodiment of the invention will be described below with reference to FIG. 7. In the second embodiment, the same components as those in the first embodiment have the same reference numerals, and a description thereof will be omitted.
In the first embodiment, different group IDs are allocated to the audio data reproducing speakers 3 a to 3 f arranged in the room r1, r2, and r3. However, in the second embodiment, as shown in FIG. 7, group IDs of group ID storage units 34 a of the audio data reproducing speakers 3 are changed according to the purpose of usage of the rooms r1, r2, and r3.
In the related art, in the facilities having a plurality of rooms, such as a hotel and a school, the same information (broadcasting content) is notified to all the rooms. Therefore, users not related to the notified information also listen to the broadcasted information carefully, which causes the users to temporarily stop their work. In addition, the information is also notified to the rooms not related to the broadcasted information or the rooms that are not used, which is inefficient. Further, in the case of emergency, since one specific language is used for emergency broadcasting, foreigners using different languages may not understand the broadcasted information, which makes it difficult for the foreigners to rapidly deal with the emergency.
In the second embodiment, different group IDs are allocated to the audio data reproducing speakers 3 a to 3 f arranged in the rooms r1, r2, and r3 according to the purpose of usage of the rooms r1, r2, and r3, and the audio data transmitting devices 2 a and 2 b transmits necessary information corresponding to the group IDs suitable for the purpose of usage.
For example, assuming that the rooms r1, r2, and r3 are rooms of a hotel, the rooms r1 and r2 are prepared for domestic guests, and the room 3 is prepared for foreign guests, the group ID ‘ID1 ’ is allocated to the audio data reproducing speakers 3 a to 3 d arranged in the rooms r1 and r2, and the group ID ‘ID 2’ is allocated to the audio data reproducing speakers 3 e and 3 f arranged in the room r3. In this case, when emergency broadcasting data is transmitted, Japanese emergency broadcasting information (audio data) including the group ID ‘ID1’ is transmitted from the audio data transmitting device 2 a to the rooms r1 and r2 for domestic guests (user) through the power line 1, and the Japanese emergency broadcasting data is reproduced by only the audio data reproducing speakers 3 a to 3 d arranged in the rooms r1 and r2 to which the group ID ‘ID1’ is allocated.
Meanwhile, foreign language (for example, English) emergency broadcasting information (audio data), which includes the group ID ‘ID2’, corresponding to the foreign guest (user) is transmitted from the audio data transmitting device 2 b to the room r3 through the power line 1, and the foreign language emergency broadcasting data is reproduced by only the audio data reproducing speakers 3 e and 3 f arranged in the room 3 to which the group ID ‘ID2’ is allocated.
An example in which this embodiment is applied to a school will be described below. In the example, it is assumed that the rooms r1 and r2 are used as classrooms for the fourth to sixth grades in the elementary school, for example, and the room r3 is used as a classroom for one of the first to third grades. In this case, when local broadcasting is performed in the school, broadcasting data (audio data) for the fourth to sixth grades, including the group ID ‘ID1’, is transmitted from the audio data transmitting device 2 to the rooms r1 and r2, which are classrooms for the fourth to sixth grades, through the power line 1, and the broadcasting data for the fourth to sixth grades is reproduced by only the audio data reproducing speakers 3 a to 3 d arranged in the rooms r1 and r2 to which the group ID ‘ID1’ is allocated.
Meanwhile, broadcasting data (audio data) for the first to third grades, including the group ID ‘ID2’, is transmitted from the audio data transmitting device 2 b to the room r3 through the power line 1, and the broadcasting data for the first to third grades is reproduced by only the audio data reproducing speakers 3 e and 3 f arranged in the room r3 to which the group ID ‘ID2 ’ is allocated.
In the audio data reproducing speakers 3 a to 3 f, a user or an administrator may arbitrarily change the group IDs of the group ID storage unit 34 a according to users for the rooms r1, r2, and r3. Alternatively, in order to perform the change, control signals may be transmitted from the audio data transmitting devices 2 a and 2 b to the audio data reproducing speakers 3 a to 3 f through the power line 1.
In the second embodiment, the group IDs ‘ID1’ and ‘ID2’ of the group ID storage unit 34 a of each of the audio data reproducing speakers 3 a to 3 f are allocated to the rooms r1, r2, and r3 according to the purpose of usage of the rooms r1, r2, and r3. Therefore, it is possible to prevent audio data from being transmitted (reproduced) to rooms not related to broadcasting or rooms that are not used in the hotel or school, which makes it possible to effectively reproduce broadcasting data. In particular, in the hotel, a room to be used by a user is set according to the language of the user, which makes it possible to perform broadcasting in a language corresponding to the user in the case of emergency broadcasting, and thus to improve safety in using facilities.
The exemplary embodiments of the invention have been described above with reference to the drawings, but the invention is not limited thereto. Various modifications and changes of the invention can be made without departing from the scope and spirit of the invention.
INDUSTRIAL APPLICABILITY
According to the audio data communication system using the power line according to the present invention can be applied to a 5.1 channel Dolby surround system.

Claims (6)

1. An audio/visual data communication system comprising:
an audio/visual data transmitting device that transmits data through a power line; and
an audio/visual data reproducing device that receives the data and reproduces the data,
wherein the audio/visual data reproducing device includes:
an instruction input unit that inputs an instruction to change the data received from the audio/visual data transmitting device;
a message generating unit that generates a message for requesting to change the data transmitted from the audio/visual data transmitted device on the basis of the instruction input through the instruction input unit; and
a message transmitting unit that transmits the message generated by the message generating unit to the audio/visual data transmitting device, and
the audio/visual data transmitting device includes:
a message receiving unit that receives the message transmitted from the message transmitting unit;
a data setting unit that sets data to be transmitted to the audio/visual data reproducing device on the basis of the message received by the message receiving unit;
a data generating unit that generates transmission data to be transmitted to the audio/visual data reproducing device on the basis of the data set by the data setting unit; and
a data transmitting unit that transmits the transmission data generated by the data generating unit to the audio/visual data reproducing device.
2. The audio/visual data communication system according to claim 1,
wherein the audio/visual data transmitting device further includes a first group ID storage unit that stores group IDs for identifying the same audio/visual data,
the audio/visual data reproducing device further includes a second group ID storage unit that stores the group IDs,
the data generating unit generates the transmission data having the group ID stored in the first group ID storage unit, and
the audio/visual data reproducing device receives data when the group ID included in the transmission data transmitted from the data transmitting unit is identical with the group ID stored in the second group ID storage unit.
3. The audio/visual data communication system according to claim 2,
wherein the audio/visual data reproducing devices are arranged in a plurality of rooms, and
the group IDs stored in the second group ID storage unit are allocated to the rooms according to the purpose of usage of the rooms.
4. An audio/visual data transmitting device that transmits data to an audio/visual data reproducing device through a power line, comprising:
a data storage unit that stores unique IDs allocated to the audio/video reproducing devices, group IDs for identifying the same audio/visual data, and audio/visual data;
a message receiving unit that receives a message for requesting to change data to be transmitted to the audio/visual data reproducing device;
a data setting unit that sets the data to be transmitted to the audio/visual data reproducing device on the basis of the message received by the message receiving unit;
a data generating unit that generates transmission data on the basis of the data stored in the data storage unit and the data set by the data setting unit; and
a data transmitting unit that transmits the transmission data generated by the data generating unit to the audio/visual data reproducing device through the power line.
5. The audio/visual data transmitting device according to claim 4,
wherein the data setting unit sets the volume of the audio/visual data, the type of the audio/visual data, or a change of the audio/visual data transmitting device, which is a source of the audio/visual data.
6. An audio/visual data reproducing device that receives data from an audio/visual data transmitting device through a power line, comprising:
a data storage unit that stores unique IDs allocated to the audio/visual data reproducing devices and group IDs for identifying the same audio/visual data;
a data receiving unit that determines whether to receive data transmitted from the audio/visual data transmitting device through the power line on the basis of the data stored in the data storage unit;
an audio/visual data reproducing unit that reproduces the data received by the data receiving unit;
an instruction input unit that inputs an instruction to change data reproduced by the audio/visual data reproducing device;
a message generating unit that generates a message for requesting to change data to be transmitted to the audio/visual data transmitting device on the basis of the instruction input through the instruction input unit; and
a message transmitting unit that transmits the message generated by the message generating unit to the audio/visual data transmitting device through the power line.
US11/574,549 2004-09-02 2005-09-02 Audio/visual data communication system, audio/visual data transmitting device, and audio/visual data reproducing device Active 2028-04-22 US7885716B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2004255416 2004-09-02
JP2004-255416 2004-09-02
JP2005245472A JP2006101496A (en) 2004-09-02 2005-08-26 Audio visual data communicating system, audio visual data transmitting apparatus, and audio visual data reproducing apparatus
JP2005-245472 2005-08-26
PCT/JP2005/016081 WO2006025514A1 (en) 2004-09-02 2005-09-02 Audio/visual data communication system, audio/visual data transmitting apparatus, and audio/visual data reproducing apparatus

Publications (2)

Publication Number Publication Date
US20070293955A1 US20070293955A1 (en) 2007-12-20
US7885716B2 true US7885716B2 (en) 2011-02-08

Family

ID=36000160

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/574,549 Active 2028-04-22 US7885716B2 (en) 2004-09-02 2005-09-02 Audio/visual data communication system, audio/visual data transmitting device, and audio/visual data reproducing device

Country Status (5)

Country Link
US (1) US7885716B2 (en)
EP (1) EP1796424A4 (en)
JP (1) JP2006101496A (en)
KR (1) KR20070047826A (en)
WO (1) WO2006025514A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150155911A1 (en) * 2013-12-03 2015-06-04 Zyxel Communications Corp. Wall-embedded Power Line Communication Device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080215441A1 (en) * 2007-03-01 2008-09-04 Siemens Enterprise Communications Gmbh & Co. Kg Interactive Hospitality System
JP4872751B2 (en) * 2007-03-29 2012-02-08 ヤマハ株式会社 Audio signal distribution management system, audio signal acquisition / transmission apparatus, audio signal identification output apparatus, and audio signal distribution apparatus
JP5040528B2 (en) 2007-08-28 2012-10-03 ソニー株式会社 Audio signal transmitting apparatus, audio signal receiving apparatus, and audio signal transmission method
JP4983485B2 (en) * 2007-08-31 2012-07-25 ソニー株式会社 Audio signal receiving apparatus, audio signal transmitting apparatus, audio signal transmission system, audio signal transmission method and program
JP4442662B2 (en) * 2007-08-31 2010-03-31 ソニー株式会社 Audio signal transmission system and audio signal transmission method
JP5278285B2 (en) * 2009-11-16 2013-09-04 ソニー株式会社 Audio signal transmission apparatus, audio signal reception apparatus, audio signal transmission method and program
JP5994968B2 (en) * 2012-01-12 2016-09-21 シャープ株式会社 Content utilization apparatus, control method, program, and recording medium

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5592482A (en) 1989-04-28 1997-01-07 Abraham; Charles Video distribution system using in-wall wiring
US5802281A (en) * 1994-09-07 1998-09-01 Rsi Systems, Inc. Peripheral audio/video communication system that interfaces with a host computer and determines format of coded audio/video signals
US6064297A (en) * 1997-06-12 2000-05-16 Microsoft Corporation Message authentication and key synchronization in home control systems
WO2001031806A1 (en) 1999-10-22 2001-05-03 Openglobe, Inc. Data power line network
JP2001275194A (en) 2000-03-27 2001-10-05 Aiwa Co Ltd Speaker system, information transmitter and speaker unit
US6346890B1 (en) * 1996-08-20 2002-02-12 Robert W. Bellin Pager-based communications system
US6348875B1 (en) 1997-06-12 2002-02-19 Microsoft Corporation Message formatting, authentication, and error detection in home control systems
US6611537B1 (en) * 1997-05-30 2003-08-26 Centillium Communications, Inc. Synchronous network for digital media streams
WO2004004178A1 (en) 2002-06-28 2004-01-08 Micronas Gmbh Wireless audio signal transmission method for a three-dimensional sound system
US20040006484A1 (en) 2001-11-13 2004-01-08 Manis Constantine N. Method and system for media content data distribution and consumption
WO2004003774A1 (en) 2002-06-27 2004-01-08 Openpeak Inc. Method, system, and computer program product for managing controlled residential or non-residential environments
US6958877B2 (en) * 2001-12-28 2005-10-25 Matsushita Electric Industrial Co., Ltd. Brushless motor and disk drive apparatus
US7015799B1 (en) * 2000-04-27 2006-03-21 Mitsubishi Denki Kabushiki Kaisha Apparatus installing device for mobile body
US7098773B2 (en) * 2003-07-03 2006-08-29 Current Technologies, Llc Power line communication system and method of operating the same
US7173935B2 (en) * 2002-06-07 2007-02-06 Current Grid, Llc Last leg utility grid high-speed data communication network having virtual local area network functionality
US7257644B2 (en) * 2002-09-19 2007-08-14 Microsoft Corporation Systems and methods for providing presence tracking in a distributed computing system
US20080084936A1 (en) * 2004-09-29 2008-04-10 Mitsubishi Materials Corporation Data Communication System, Data Reproducing Device, and Method of Reproducing Data

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6466832B1 (en) * 1998-08-24 2002-10-15 Altec Lansing R & D Center Israel High quality wireless audio speakers
JP2003037604A (en) * 2001-07-23 2003-02-07 Matsushita Electric Ind Co Ltd Equipment grouping system, receiver, managing device, equipment grouping method, program and medium
JP2004048524A (en) * 2002-07-15 2004-02-12 Sony Corp Information processing apparatus and method therefor, information processing system, recording medium, and program

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5592482A (en) 1989-04-28 1997-01-07 Abraham; Charles Video distribution system using in-wall wiring
US5802281A (en) * 1994-09-07 1998-09-01 Rsi Systems, Inc. Peripheral audio/video communication system that interfaces with a host computer and determines format of coded audio/video signals
US6346890B1 (en) * 1996-08-20 2002-02-12 Robert W. Bellin Pager-based communications system
US6611537B1 (en) * 1997-05-30 2003-08-26 Centillium Communications, Inc. Synchronous network for digital media streams
US6064297A (en) * 1997-06-12 2000-05-16 Microsoft Corporation Message authentication and key synchronization in home control systems
US6348875B1 (en) 1997-06-12 2002-02-19 Microsoft Corporation Message formatting, authentication, and error detection in home control systems
WO2001031806A1 (en) 1999-10-22 2001-05-03 Openglobe, Inc. Data power line network
JP2001275194A (en) 2000-03-27 2001-10-05 Aiwa Co Ltd Speaker system, information transmitter and speaker unit
US7015799B1 (en) * 2000-04-27 2006-03-21 Mitsubishi Denki Kabushiki Kaisha Apparatus installing device for mobile body
US20040006484A1 (en) 2001-11-13 2004-01-08 Manis Constantine N. Method and system for media content data distribution and consumption
US6958877B2 (en) * 2001-12-28 2005-10-25 Matsushita Electric Industrial Co., Ltd. Brushless motor and disk drive apparatus
US7173935B2 (en) * 2002-06-07 2007-02-06 Current Grid, Llc Last leg utility grid high-speed data communication network having virtual local area network functionality
WO2004003774A1 (en) 2002-06-27 2004-01-08 Openpeak Inc. Method, system, and computer program product for managing controlled residential or non-residential environments
WO2004004178A1 (en) 2002-06-28 2004-01-08 Micronas Gmbh Wireless audio signal transmission method for a three-dimensional sound system
US7257644B2 (en) * 2002-09-19 2007-08-14 Microsoft Corporation Systems and methods for providing presence tracking in a distributed computing system
US7098773B2 (en) * 2003-07-03 2006-08-29 Current Technologies, Llc Power line communication system and method of operating the same
US20080084936A1 (en) * 2004-09-29 2008-04-10 Mitsubishi Materials Corporation Data Communication System, Data Reproducing Device, and Method of Reproducing Data

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
International Search Report for PCT/JP2005/016081 mailed Dec. 13, 2005.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150155911A1 (en) * 2013-12-03 2015-06-04 Zyxel Communications Corp. Wall-embedded Power Line Communication Device
US9755694B2 (en) * 2013-12-03 2017-09-05 Zyxel Communications Corp. Wall-embedded power line communication device

Also Published As

Publication number Publication date
JP2006101496A (en) 2006-04-13
US20070293955A1 (en) 2007-12-20
EP1796424A4 (en) 2009-06-10
EP1796424A1 (en) 2007-06-13
WO2006025514A1 (en) 2006-03-09
KR20070047826A (en) 2007-05-07

Similar Documents

Publication Publication Date Title
US7885716B2 (en) Audio/visual data communication system, audio/visual data transmitting device, and audio/visual data reproducing device
US10158946B2 (en) Speaker discovery and assignment
US8776147B2 (en) Source device change using a wireless home entertainment hub
CN104115224A (en) Systems, methods, apparatus, and articles of manufacture to control audio playback devices
CN104115449A (en) Systems and methods for connecting an audio controller to a hidden audio network
US20080069319A1 (en) Control of Data Presentation Using a Wireless Home Entertainment Hub
US20080068152A1 (en) Control of Data Presentation from Multiple Sources Using a Wireless Home Entertainment Hub
JP2008153827A (en) Message transmitting method and wireless transmission device using the same
EP3477485B1 (en) Distribution destination designation device, distribution destination designation method, and distribution destination designation program
KR20110115419A (en) Wireless microphone system capable of automatically channel granting
US20090010183A1 (en) Function configuration method of electronic apparatuses
JP6547715B2 (en) Control terminal device, audio system, and audio system control method
JP2016178422A (en) Voice radio transmission system, speaker apparatus, and source apparatus
KR200302580Y1 (en) A control system for plural audio signal and speaker group
WO2022176642A1 (en) Acoustic system, method for controlling acoustic system, and delivery device
WO2022176641A1 (en) Acoustic system, acoustic system control method, acoustic apparatus, speaker, and distribution apparatus
US20160192072A1 (en) Digital media distribution system
KR20160028531A (en) Integrated Public Address Broadcasting Apparatus and System
JP2013201651A (en) Av amplifier
KR100923511B1 (en) The public address with the way inserting a disital amp in small quantity
Nielsen Multichannel Signal Processing Tools-differences to multiple single channel processing
Craven The" Hierarchical" Viewpoint
JP2004179934A (en) Mobile terminal device, reproducing device, and data management device
Karagosian Partitioning of Functions in Systems and Products
KR20100103106A (en) The public address with the way inserting a disital amp in small quantity

Legal Events

Date Code Title Description
AS Assignment

Owner name: MITSUBISHI MATERIALS CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YAMASHITA, NOBUYUKI;TARI, KAZUYOSHI;NAKAMURA, KENZO;REEL/FRAME:019189/0183;SIGNING DATES FROM 20070309 TO 20070312

Owner name: MITSUBISHI MATERIALS CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YAMASHITA, NOBUYUKI;TARI, KAZUYOSHI;NAKAMURA, KENZO;SIGNING DATES FROM 20070309 TO 20070312;REEL/FRAME:019189/0183

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552)

Year of fee payment: 8

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 12